Isolation and influence of carbon source on the production of extracellular polymeric substance by bacteria for the bioremediation of heavy metals in Santo Amaro city

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dc.creatorLeila Thaise Santana de Oliveira Santos
dc.creatorKayque Frota Sampaio
dc.creatorElisa Esposito
dc.creatorElinalva Maciel Paulo
dc.creatorAristóteles Góes-Neto
dc.creatorAmanda da Silva Souza
dc.creatorTaise Bomfim de Jesus
dc.date.accessioned2026-01-06T21:46:22Z
dc.date.issued2024-02-09
dc.description.sponsorshipFAPESP - Fundação de Amparo à Pesquisa do Estado de São Paulo
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.29328/journal.acee.1001060
dc.identifier.issn2574-0350
dc.identifier.urihttps://hdl.handle.net/1843/1309
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofAnnals of Civil and Environmental Engineering
dc.rightsAcesso aberto
dc.rightsAcesso aberto
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/us/
dc.subjectBiodegradação Ambiental
dc.subjectMetais Pesados
dc.subjectAdsorção
dc.subjectBactérias
dc.titleIsolation and influence of carbon source on the production of extracellular polymeric substance by bacteria for the bioremediation of heavy metals in Santo Amaro city
dc.typeArtigo de periódico
local.citation.epage17
local.citation.spage12
local.citation.volume8
local.description.resumoThe city of Santo Amaro (Bahia, Brazil) gained visibility among the scientific community due to the contamination of the Subaé River by lead and cadmium from the PLUMBUM Mineração e Metalurgia Ltda industry, on the banks of the river in 1956, which produced lead ingots The present work aimed to investigate the adsorption capacity of heavy metals (Pb and Cd) of EPS produced by bacterial species from the Subaé River, for possible future application of these biopolymers in bioremediation processes in areas impacted by the aforementioned heavy metals. Subaé river water was collected for physical-chemical analysis and bacterial isolation. It was verified that all isolated bacteria produced an expressive amount of Exopolysaccharide (EPS). Thus, the optimization of this production in different sugars (sucrose, glucose, and mannitol) and in three different pHs: 5.5; 6.5, and 7.5. All bacteria produced EPS in large quantities and the best sugar was sucrose at pH 7.5. In order to use the EPS for the bioremediation area, the adsorption test of lead and cadmium was carried out by the isolated EPS. 0.5 g of the EPS was dissolved in 50 ml of deionized water, then the solutions of metals, lead acetate, and cadmium sulfate (procedure performed separately) were incubated at 28 °C for 16 h after that period, and were centrifuged. Samples were filtered to separate the insoluble EPS and the filtrates obtained were used in the quantification of the metals by atomic absorption (FAAS- Flame Atomic Absorption Spectrometry). Bacillus spp., Bacillus cereus, Staphylococcus spp., and Serratiamarcescens, all showed tolerance to the tested metals, due to the efficiency in the adsorption capacity of the EPS, and it was possible to distinguish seven genera, Klebsiella pneumonia, Pseudomonas aeruginosa, Lysinibacillus spp. to be used in the bioremediation of environments contaminated with heavy metals.
local.publisher.countryBrasil
local.publisher.departmentICB - DEPARTAMENTO DE MICROBIOLOGIA
local.publisher.initialsUFMG
local.subject.cnpqCIENCIAS BIOLOGICAS
local.url.externahttps://www.civilenvironjournal.com/index.php/acee/article/view/acee-aid1060

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